![]() It can be difficult to differentiate for the untrained eye, especially if that current has leapt from one pipe to another. When reading EM, the user is looking for the field – not the current itself. Bleed off (the current jumps to a different pipe than the one you think you’re reading).Frequencies (what the unit is set on and what it is reading).Weak, jumpy signals/readings or signal spikes.False signals from concrete reinforcements.False signals from incorrect/oversensitive settings.False signals from surrounding terrain/utilities.Beyond its limitation of only reading metallic pipes, its nature as a conductive technology means you must understand how to overcome: Highly trained locators understand that terrain, soil composition, age of the lines, and the location of surrounding structures are just some of the mitigating factors they need to take into consideration while scanning.ĮM is simpler to use than GPR, but it brings its own unique challenges for the operator. The most accurate locators employ both GPR and EM in their subsurface utility locates because their training and experience have taught them that this is the best way to get the job done right the first time. The biggest drawback of EM locating is that it cannot locate non-metallic pipes without the use of a rodder. You can rent the equipment for around $300 per week, however, as with GPR, it requires proper training to use correctly. Like GPR systems, EM locators are designed for ease of use. They can handle even the most complicated locates with ease and efficiency. SIM Certification requires 80 hours of classroom instruction and 320 hours of field training, making GPRS Project Managers experts in all types of equipment, including GPR and EM. This in-depth process is how GPRS has maintained over a 99.8% accuracy rate on over 350,000 jobs. In contrast, GPRS Project Managers exceed minimum requirements, receiving SIM Certification, which stands for Subsurface Investigation Methodology. Meeting these minimum standards costs $1,000 with a similar cost for certification at higher levels. Level 1 NDT certification, the minimum most companies use, requires 40 hours of practice and field training along with eight hours of classroom time. Moreover, this training does not provide industry standard certification. However, they do not cover the required field training where students must learn to read signals in various conditions. Since the Common Ground Alliance reports over 1,100 utility strikes per day, top-tier locator training is crucial.īasic online GPR classes, which only offer eight hours of classroom training, cost about $600. GPS positioning is captured alongside the Line View data for integrating into geo-referencing packages.Utility strikes are serious risks with high potential costs in time, money, and lives. Instant information, higher productivity! These can be exported later to a USB memory stick or emailed by connecting to a Wi-Fi network or by using a cell phone as a hotspot. Screenshots are taken with a single button press and saved to internal memory as JPGs. ![]() Its high resolution touch screen display adds to its ease of use, including the ability to draw arrows directly on the screen to highlight subsurface features of interest. Designed for the utility industry, the RD1100 features a wide-band sensor capable of detecting plastic and ceramic utilities at depths of up to 8m / 27’ deep. ![]() Radiodetection’s RD1100 provides high-performance subsurface imaging for buried utilities in a rugged and competitively priced GPR system. The RD1100™ Ground Penetrating Radar detects both conductive and non-conductive underground utilities using wide-band radar technology and features internal GPS, on-board Wi-Fi and a high resolution touch screen.
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